Company lists · Data refreshed September 2026

Top 25 Directional drilling service companies based in the United States

Name: Directional drilling service companies based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 15, 2026 723 companies tracked

RevenueBase identified 723 directional drilling service companies headquartered in the United States as of September 2026 and tracks 24,136 professional contacts across them, including 5,472 with verified work emails. Houston is the largest hub.

This list covers directional drilling service companies headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 15, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 15, 2026 86% judged on-target in blind review

723Companies

24,136Contacts tracked

5,472Verified emails

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The 25 largest directional drilling service companies based in the United States

Ranked by team size

Top 25 of 723 directional drilling service companies based in the United States, ranked by team size, largest first. Data refreshed Sep 15, 2026. RevenueBase Smart Search rates how each company's information relates to directional drilling service companies: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Patterson-Uti	Partial evidence	Houston, TX, United StatesHQ checked Sep 15, 2026	10001+	2,317 contacts →
	Partial evidence “Patterson-UTI is a leading provider of drilling and completion services to oil and natural gas exploration and production companies in the United States and other select…” Source: RevenueBase Database · checked Sep 15, 2026
2	Scientific Drilling	Partial evidence	The Woodlands, TX, United StatesHQ checked Sep 15, 2026	1,001-5,000	1,134 contacts →
	Partial evidence “THE ULTIMATE PARTNER IN WELLBORE PLACEMENT Scientific Drilling International is an independent service provider offering a complete high accuracy wellbore placement and drilling…” Source: RevenueBase Database · checked Sep 15, 2026
3	Nine Energy Service	Indirect evidence	Houston, TX, United StatesHQ checked Sep 15, 2026	1,001-5,000	712 contacts →
	Indirect evidence “With a culture built on high performance and flawless execution, Nine Energy Service is a unique kind of oilfield services company, offering industry-shaping completion solutions…” Source: RevenueBase Database · checked Sep 15, 2026
4	Ulterra Drilling Technologies L.P	Partial evidence	Fort Worth, TX, United StatesHQ checked Sep 15, 2026	501-1,000	535 contacts →
	Partial evidence “Ulterra is a forward-thinking drilling partner whose purpose is to empower people to advance the oil field.” Source: RevenueBase Database · checked Sep 15, 2026
5	Ranger Energy Services, LLC	Indirect evidence	Houston, TX, United StatesHQ checked Sep 15, 2026	1,001-5,000	501 contacts →
	Indirect evidence “Ranger is one of the largest providers of high specification mobile rig well services, cased hole wireline services, and ancillary services in the U.S.” Source: RevenueBase Database · checked Sep 15, 2026
6	Cactus Drilling CO	Partial evidence	Oklahoma City, OK, United StatesHQ checked Sep 15, 2026	1,001-5,000	440 contacts →
	Partial evidence “As the largest privately-held domestic land drilling contractor in the United States, Cactus provides competent, motivated personnel utilizing premium equipment to meet and exceed…” Source: RevenueBase Database · checked Sep 15, 2026
7	Deep Well Services	Indirect evidence	Zelienople, PA, United StatesHQ checked Sep 15, 2026	501-1,000	384 contacts →
	Indirect evidence “Established in 2008, Deep Well Services (DWS) is an oilfield services company specializing in the most complex and difficult types of well work utilizing hydraulic completion…” Source: RevenueBase Database · checked Sep 15, 2026
8	AIR Drilling Associates	Partial evidence	Houston, TX, United StatesHQ checked Sep 15, 2026	201-500	328 contacts →
	Partial evidence “ADA is a global energy services company specializing in advanced drilling solutions for oil, gas, and geothermal applications.” Source: RevenueBase Database · checked Sep 15, 2026
9	Total Directional Services, LLC	Partial evidence	Windsor, CO, United StatesHQ checked Sep 15, 2026	51-200	313 contacts →
	Partial evidence “Total Directional Services, LLC is a privately owned, managed and operated service company headquartered in Windsor, CO.” Source: RevenueBase Database · checked Sep 15, 2026
10	Leam Drilling Services	Partial evidence	New Iberia, LA, United StatesHQ checked Sep 15, 2026	501-1,000	291 contacts →
	Partial evidence “LEAM Drilling Systems, Inc.” Source: RevenueBase Database · checked Sep 15, 2026
11	Altitude Energy Partners	Strong evidence	The Woodlands, TX, United StatesHQ checked Sep 15, 2026	51-200	288 contacts →
	Strong evidence “Altitude Energy Partners (AEP) provides trusted expertise in Directional Drilling.” Source: RevenueBase Database · checked Sep 15, 2026
12	Independence Contract Drilling	Partial evidence	Houston, TX, United StatesHQ checked Sep 15, 2026	201-500	286 contacts →
	Partial evidence “Corporate Overview Independence Contract Drilling was formed in 2011 as a vertically integrated premium land drilling services provider.” Source: RevenueBase Database · checked Sep 15, 2026
13	Drilling Tools International, INC	Indirect evidence	Houston, TX, United StatesHQ checked Sep 15, 2026	201-500	270 contacts →
	Indirect evidence “Strength.” Source: RevenueBase Database · checked Sep 15, 2026
14	Grupo IPS	Indirect evidence	Conroe, TX, United StatesHQ checked Sep 15, 2026	51-200	245 contacts →
	Indirect evidence “IPS is an integrated oilfield service company with over 20 years in the business.” Source: RevenueBase Database · checked Sep 15, 2026
15	Prodirectional	Strong evidence	Conroe, TX, United StatesHQ checked Sep 15, 2026	201-500	232 contacts →
	Strong evidence “ProDirectional was established in 2001 by experienced drilling industry professionals who believed the oil and gas services market was lacking a directional services company that…” Source: RevenueBase Database · checked Sep 15, 2026
16	MS Directional	Strong evidence	Conroe, TX, United StatesHQ checked Sep 15, 2026	501-1,000	215 contacts →
	Strong evidence “For more than 30 years, MS Directional, a Patterson-UTI company, has led the way in directional drilling services across North America.” Source: RevenueBase Database · checked Sep 15, 2026
17	MS Energy Services	Partial evidence	Conroe, TX, United StatesHQ checked Sep 15, 2026	501-1,000	209 contacts →
	Partial evidence “Visit us at MS Directional” Source: RevenueBase Database · checked Sep 15, 2026
18	Renegade Services	Indirect evidence	Levelland, TX, United StatesHQ checked Sep 15, 2026	501-1,000	197 contacts →
	Indirect evidence “Renegade Services is the largest privately owned wireline service company servicing the oil and gas industry in the United States.” Source: RevenueBase Database · checked Sep 15, 2026
19	Casedhole-Solutions, Inc.- A C&j Energy Company	Indirect evidence	Houston, TX, United StatesHQ checked Sep 15, 2026	501-1,000	191 contacts →
	Indirect evidence “Getting it done right.” Source: RevenueBase Database · checked Sep 15, 2026
20	Reservoir Group	Indirect evidence	Stafford, TX, United StatesHQ checked Sep 15, 2026	201-500	178 contacts →
	Indirect evidence “Reservoir Group is a world-class niche oilfield services company that has been addressing customer challenges for more than 70 years.” Source: RevenueBase Database · checked Sep 15, 2026
21	Cyclone Drilling INC	Partial evidence	Gillette, WY, United StatesHQ checked Sep 15, 2026	501-1,000	153 contacts →
	Partial evidence “Cyclone Drilling Inc is an Oil and Gas Drilling Contractor in the Rocky Mountain Region.” Source: RevenueBase Database · checked Sep 15, 2026
22	National EWP	Partial evidence	Elko, NV, United StatesHQ checked Sep 15, 2026	201-500	146 contacts →
	Partial evidence “National provides mining companies primarily working in the Western United States with the safest, most competitive drilling services in the industry.” Source: RevenueBase Database · checked Sep 15, 2026
23	WWT International	Partial evidence	Houston, TX, United StatesHQ checked Sep 15, 2026	51-200	138 contacts →
	Partial evidence “Since 1989 WWT International (WWT) has been developing unique products to help operators reach farther in drilling, completion and intervention worldwide.” Source: RevenueBase Database · checked Sep 15, 2026
24	PV Fluid Products	Indirect evidence	Houston, TX, United StatesHQ checked Sep 15, 2026	51-200	128 contacts →
	Indirect evidence “PV Fluid Products is a dynamic, privately owned company that specializes in the design, manufacture, supply and support of progressing cavity power sections used in downhole…” Source: RevenueBase Database · checked Sep 15, 2026
25	Stryker Energy Directional Services, LLC	Strong evidence	Conroe, TX, United StatesHQ checked Sep 15, 2026	51-200	113 contacts →
	Strong evidence “Stryker Directional is a full-service directional drilling company with experience in the most prominent onshore basins in the United States.” Source: RevenueBase Database · checked Sep 15, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: directional drilling service companies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names directional drilling service companies.
Partial evidence: Its own public description names part of directional drilling service companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name directional drilling service companies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 723 directional drilling service companies based in the United States

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Directional drilling service companies based in the United States at a glance

As of Sep 15, 2026

22.7%Verified-email coverage

33.4Average contacts per company

11-50Median size (employees)

12.2%Largest-city concentration · Houston

Sep 15, 2026Page data refreshed

Companies by employee count

1-10

222

11-50

297

51-200

139

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 723 companies.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among directional drilling service companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United States whose own description of what they do matches “directional drilling service companies”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names directional drilling service companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among directional drilling service companies, and records with no verified work email. Companies headquartered outside United States are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 5,472 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 15, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Directional drilling service companies by metro

Directional drilling service companies in Houston88
Directional drilling service companies in Midland25

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names directional drilling service companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many directional drilling service companies are there based in the United States?

RevenueBase identified 723 directional drilling service companies headquartered in the United States as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Patterson-Uti, headquartered in Houston, tops this list with the largest team on record.

Which city has the most directional drilling service companies?

Houston leads with 88 headquartered companies, followed by Midland (25) and Conroe (19).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 5,472 verified decision-maker contacts tracked across these 723 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 15, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.